Proofpoint has agreed to buy Emerging Threats, an Indianapolis-based cybersecurity research company. The value of the transaction is about $40 million. Emerging Threats’s backers included Elevate Ventures and HALO Capital Group.

Proofpoint has agreed to buy Nexgate for about $35 million in cash. Nexgate is a provider of security and compliance solutions for social media communication channels. Its backers included Sierra Ventures and Windforce Ventures.

Big data software maker Splunk floated shares at $17 this morning, and they are presently trading at $32.01, an 88.3% rise. The San Francisco company priced them above its anticipated $11 to $13 range and raised $229.5 million.